Whenever you like, of course!
Adding sound would really bring it to life. As I mentioned in my jam comment, the level design could be developed much further; if you want to add more elements, like buttons that open doors or move platforms, that could give you more to work with in terms of level design!
I also like how the dash is implemented, though I think it could use a bit more application.
But yeah, overall, expanding it would be a great idea!